With a detector system for the specimen chamber of a scanning electron microscope, signals are simultaneously detected in transmission which signals correspond to a light field contrast and a dark field contrast. By virtue of this measure, it is possible to achieve a uniform current flow in all three interconnects even at very high frequencies. These modules are: Mitochondrial Metabolic Group, Plasma and Mitochondrial Membrane Integrity Group, Nocturnal Group and, Insulin Alternative Group. , in the performance of surgical procedures using particular sling implantation tools to implant a urethral sling to support the urethra or bladder to treat incontinence.